oj.uz

Submission #799401

# Submission time Handle Problem Language Result Execution time Memory
799401 2023-07-31T13:51:06 Z future Election Campaign (JOI15_election_campaign) C++17
100 / 100
 195 ms 32844 KB 
#include <bits/stdc++.h>

using namespace std;
const int N=1e5+5;
int n,m;
vector<int>g[N];
int tab[18][N];
int depth[N];
int pos=0;
int in[N];
int out[N];
void DFS(int u,int par) {
    pos++;
    in[u]=pos;
    for(auto v:g[u])
        if(v!=par) {
            tab[0][v]=u;
            depth[v]=depth[u]+1;
            DFS(v,u);
        }
    out[u]=pos;
}
void init() {
    depth[1]=1;
    DFS(1,0);
    for(int i=1; i<=17; i++)
        for(int j=1; j<=n; j++)
            tab[i][j]=tab[i-1][tab[i-1][j]];
}
int LCA(int u,int v) {
    if(depth[u]<depth[v])swap(u,v);
    for(int i=17; i>=0; i--)if(depth[tab[i][u]]>=depth[v])u=tab[i][u];
    if(u==v)return u;
    for(int i=17; i>=0; i--)if(tab[i][u]!=tab[i][v]) {
            v=tab[i][v];
            u=tab[i][u];
        }
    return tab[0][u];
}
long long dp[N];
struct event {
    int u,v,c;
};
vector<event>save[N];
long long aib[N];
void add(int i, int x) {
    while (i <N) {
        aib[i] += x;
        i += i & (-i);
    }
}

long long get(int i) {
    int sol = 0;
    while (i) {
        sol += aib[i];
        i -= i & (-i);
    }
    return sol;
}
long long sum[N];

void DFS_ans(int u,int par) {
    for(auto v:g[u])
        if(v!=par) {
            DFS_ans(v,u);
            sum[u]+=dp[v];
        }
    dp[u]=sum[u];
    for(auto v:save[u]) {
        dp[u]=max(dp[u],get(in[v.u])+get(in[v.v])+v.c+sum[u]);
    }
    add(in[u],sum[u]-dp[u]);
    add(out[u]+1,dp[u]-sum[u]);
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    for(int i=1; i<n; i++) {
        int u,v;
        cin>>u>>v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    init();
    cin>>m;
    while(m--) {
        int u,v,c;
        cin>>u>>v>>c;
        save[LCA(u,v)].push_back({u,v,c});
    }
    DFS_ans(1,0);
    cout<<dp[1];
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5152 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 45 ms 20004 KB Output is correct
6 Correct 33 ms 29216 KB Output is correct
7 Correct 48 ms 25908 KB Output is correct
8 Correct 38 ms 19536 KB Output is correct
9 Correct 65 ms 24028 KB Output is correct
10 Correct 46 ms 19556 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5076 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5296 KB Output is correct
4 Correct 94 ms 32520 KB Output is correct
5 Correct 99 ms 32456 KB Output is correct
6 Correct 99 ms 32468 KB Output is correct
7 Correct 109 ms 32536 KB Output is correct
8 Correct 99 ms 32460 KB Output is correct
9 Correct 96 ms 32500 KB Output is correct
10 Correct 95 ms 32520 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5076 KB Output is correct
2 Correct 2 ms 5076 KB Output is correct
3 Correct 3 ms 5296 KB Output is correct
4 Correct 94 ms 32520 KB Output is correct
5 Correct 99 ms 32456 KB Output is correct
6 Correct 99 ms 32468 KB Output is correct
7 Correct 109 ms 32536 KB Output is correct
8 Correct 99 ms 32460 KB Output is correct
9 Correct 96 ms 32500 KB Output is correct
10 Correct 95 ms 32520 KB Output is correct
11 Correct 10 ms 6100 KB Output is correct
12 Correct 99 ms 32784 KB Output is correct
13 Correct 104 ms 32832 KB Output is correct
14 Correct 97 ms 32740 KB Output is correct
15 Correct 97 ms 32844 KB Output is correct
16 Correct 96 ms 32800 KB Output is correct
17 Correct 102 ms 32744 KB Output is correct
18 Correct 103 ms 32836 KB Output is correct
19 Correct 120 ms 32840 KB Output is correct
20 Correct 99 ms 32820 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 22744 KB Output is correct
2 Correct 96 ms 32512 KB Output is correct
3 Correct 154 ms 28892 KB Output is correct
4 Correct 94 ms 22448 KB Output is correct
5 Correct 132 ms 28212 KB Output is correct
6 Correct 93 ms 22396 KB Output is correct
7 Correct 169 ms 27916 KB Output is correct
8 Correct 123 ms 22968 KB Output is correct
9 Correct 94 ms 32524 KB Output is correct
10 Correct 195 ms 26796 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5152 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 45 ms 20004 KB Output is correct
6 Correct 33 ms 29216 KB Output is correct
7 Correct 48 ms 25908 KB Output is correct
8 Correct 38 ms 19536 KB Output is correct
9 Correct 65 ms 24028 KB Output is correct
10 Correct 46 ms 19556 KB Output is correct
11 Correct 4 ms 5332 KB Output is correct
12 Correct 3 ms 5332 KB Output is correct
13 Correct 4 ms 5300 KB Output is correct
14 Correct 3 ms 5276 KB Output is correct
15 Correct 3 ms 5296 KB Output is correct
16 Correct 4 ms 5360 KB Output is correct
17 Correct 3 ms 5332 KB Output is correct
18 Correct 3 ms 5324 KB Output is correct
19 Correct 3 ms 5332 KB Output is correct
20 Correct 4 ms 5420 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5152 KB Output is correct
3 Correct 2 ms 5076 KB Output is correct
4 Correct 3 ms 5204 KB Output is correct
5 Correct 45 ms 20004 KB Output is correct
6 Correct 33 ms 29216 KB Output is correct
7 Correct 48 ms 25908 KB Output is correct
8 Correct 38 ms 19536 KB Output is correct
9 Correct 65 ms 24028 KB Output is correct
10 Correct 46 ms 19556 KB Output is correct
11 Correct 2 ms 5076 KB Output is correct
12 Correct 2 ms 5076 KB Output is correct
13 Correct 3 ms 5296 KB Output is correct
14 Correct 94 ms 32520 KB Output is correct
15 Correct 99 ms 32456 KB Output is correct
16 Correct 99 ms 32468 KB Output is correct
17 Correct 109 ms 32536 KB Output is correct
18 Correct 99 ms 32460 KB Output is correct
19 Correct 96 ms 32500 KB Output is correct
20 Correct 95 ms 32520 KB Output is correct
21 Correct 10 ms 6100 KB Output is correct
22 Correct 99 ms 32784 KB Output is correct
23 Correct 104 ms 32832 KB Output is correct
24 Correct 97 ms 32740 KB Output is correct
25 Correct 97 ms 32844 KB Output is correct
26 Correct 96 ms 32800 KB Output is correct
27 Correct 102 ms 32744 KB Output is correct
28 Correct 103 ms 32836 KB Output is correct
29 Correct 120 ms 32840 KB Output is correct
30 Correct 99 ms 32820 KB Output is correct
31 Correct 141 ms 22744 KB Output is correct
32 Correct 96 ms 32512 KB Output is correct
33 Correct 154 ms 28892 KB Output is correct
34 Correct 94 ms 22448 KB Output is correct
35 Correct 132 ms 28212 KB Output is correct
36 Correct 93 ms 22396 KB Output is correct
37 Correct 169 ms 27916 KB Output is correct
38 Correct 123 ms 22968 KB Output is correct
39 Correct 94 ms 32524 KB Output is correct
40 Correct 195 ms 26796 KB Output is correct
41 Correct 4 ms 5332 KB Output is correct
42 Correct 3 ms 5332 KB Output is correct
43 Correct 4 ms 5300 KB Output is correct
44 Correct 3 ms 5276 KB Output is correct
45 Correct 3 ms 5296 KB Output is correct
46 Correct 4 ms 5360 KB Output is correct
47 Correct 3 ms 5332 KB Output is correct
48 Correct 3 ms 5324 KB Output is correct
49 Correct 3 ms 5332 KB Output is correct
50 Correct 4 ms 5420 KB Output is correct
51 Correct 182 ms 23260 KB Output is correct
52 Correct 100 ms 32752 KB Output is correct
53 Correct 137 ms 27224 KB Output is correct
54 Correct 116 ms 22808 KB Output is correct
55 Correct 116 ms 23036 KB Output is correct
56 Correct 109 ms 32740 KB Output is correct
57 Correct 169 ms 27984 KB Output is correct
58 Correct 94 ms 22660 KB Output is correct
59 Correct 130 ms 23312 KB Output is correct
60 Correct 97 ms 32732 KB Output is correct
61 Correct 151 ms 28044 KB Output is correct
62 Correct 90 ms 22436 KB Output is correct
63 Correct 145 ms 22872 KB Output is correct
64 Correct 98 ms 32840 KB Output is correct
65 Correct 139 ms 27884 KB Output is correct
66 Correct 96 ms 22728 KB Output is correct
67 Correct 161 ms 23028 KB Output is correct
68 Correct 97 ms 32816 KB Output is correct
69 Correct 135 ms 26596 KB Output is correct
70 Correct 90 ms 22828 KB Output is correct